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All Journal Jurnal Ilmu dan Teknologi Kelautan Tropis IJCCS (Indonesian Journal of Computing and Cybernetics Systems) Scientific Journal of Informatics Jurnal Penelitian Pendidikan IPA (JPPIPA) Spektra: Jurnal Fisika dan Aplikasinya Journal of Physics and Its Applications Jurnal Kelautan Nasional Sainmatika: Jurnal Ilmiah Matematika dan Ilmu Pengetahuan Alam Jurnal Ilmu Fisika Jurnal Pendidikan Fisika dan Teknologi Eksakta : Berkala Ilmiah Bidang MIPA Jurnal Kumparan Fisika Kappa Journal Authentic Research of Global Fisheries Application Journal (Aurelia Journal) Indonesian Review of Physics (IRiP) MARLIN : Marine and Fisheries Science Technology Journal TECHNO-SOCIO EKONOMIKA Zona Laut : Jurnal Inovasi Sains dan Teknologi Kelautan
Lulut Alfaris
Department Of Marine Technology, Politeknik Kelautan Dan Perikanan Pangandaran
Aerospace Engineering Agriculture, Biological Sciences & Forestry Astronomy Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics Social Sciences Transportation Other

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Journal : Kappa Journal

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Analysis of Solar Flux and Sunspot Correlation Case Study: A Statistical Perspective Ruben Cornelius Siagian; Lulut Alfaris; Budiman Nasution; Habibi Azka Nasution
Kappa Journal Vol 7 No 1 (2023): April
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v7i1.12238

Abstract

This analysis examines the relationship between the number of solar flares and the number of sunspots in 2005 using 11 observations in months 2 to 12. The number of solar currents measures the intensity of the radiation emitted by the Sun, while the number of sunspots measures the number of sunspots on the surface of the Sun. Multivariate linear regression analysis was used to analyze the relationship between Solar Current Rate and Number of Sunspots. The results of the analysis show that the coefficient of the Amount of Solar Current is 1.1239 with a significant t value of 2.510 (probability that there is no effect on the Number of Sunspots is 3.33%). The linear regression model has good results with an F-statistic value of 6.301 and a p-value of 0.0333, with an R-squared value of 0.4118 which indicates that 41.18% of the variation in the number of sunspots is influenced by variations in the amount of solar currents. The corrected R-squared value is 0.3464 indicating that there are still variations in the number of sunspots that cannot be explained by variations in the number of solar currents. ARIMA analysis results show an MA coefficient of 0.7351 with an average value of 45.9542 and a s.e value of 0.2590 and 6.1550 respectively. The AIC, AICc, and BIC values are 92.97, 96.4, and 94.16. The error results in the training set show that the ME value is 0.2615561, the RMSE value is 12.16969, the MAE value is 9.03306, the MPE value is -15.14689, the MAPE value is 30.42013, and the MASE value is 0.674109. The ACF1 value in the exercise set is 0.0808969.
Separation of Variables Method in Solving Partial Differential Equations and Investigating the Relationship between Gravitational Field Tensor and Energy-Momentum Tensor in Einstein's Theory of Gravity Ruben Cornelius Siagian; Lulut Alfaris; Arip Nurahman; Aldi Cahya Muhammad; Ukta Indra Nyuswantoro; Budiman Nasution
Kappa Journal Vol 7 No 2 (2023): Agustus
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/kpj.v7i2.20921

Abstract

This research delves into the study of partial differential equations (PDEs) and gravitational fields in spacetime. It focuses on solving PDEs using the Separation of Variables method and explores the relationship between the gravitational field tensor and the energy-momentum tensor, leading to the final equation for the gravitational field tensor. The research also investigates Einstein's theory of gravity and the energy-momentum tensor integral, providing the general solution for the gravitational potential and its implications. Additionally, the mean integration of the gravitational wave tensor is analyzed, yielding an expression for the tensor strain of gravitational waves over an infinitely long period. The components of the gravitational wave tensor and their effect on gravitational sources are examined. Furthermore, the propagation of electromagnetic fields in spacetime is studied using the Retarded Green's Function. The primary objectives of this research are to understand and explore mathematical techniques for solving PDEs and analyzing gravitational fields and their interactions in spacetime. The integration of multiple theoretical concepts related to PDEs, gravitational fields, and electromagnetic fields enhances our understanding of fundamental physics principles. This contributes to the advancement of theoretical physics and opens avenues for potential practical applications, such as gravitational wave detection and electromagnetic field propagation in complex media. In conclusion, this research provides valuable insights into fundamental physics principles and fosters a deeper understanding of their interconnections and implications
Co-Authors Aldi Cahya Muhammad Aldi Cahya Muhammad Aldi Cahya Muhammad Aldi Cahya Muhammad Aldi Cahya Muhammad Aldi Cahya Muhammad Aldi Cahya Muhammad Aldi Cahya Muhammad Arif Baswantara Arip Nurahman Arip Nurahman Arip Nurahman Arip Nurahman Arip Nurahman Arip Nurahman Batih Shendy Capri Hareva Budiman Nasution Eko Pramesti Sumarto Eko Pramesti Sumarto Firdaus, Anas Noor Froilan Delute Mobo Gendewa Tunas Rancak Gendewa Tunas Rancak Ghulab Nabi Ahmad Godwin Latuputty Goldberd Harmuda Duva Sinaga Goldberd Harmuda Duva Sinaga Habibi Azka Nasution Indah Indah Ma’muri Ma’muri Mia Endang Sari Sinaga Miranda Putri Nazish Laeiq Nazish Laeiq Nazish Laeiq Nunik Wijayanti Pandara, Dolfie Paulus Putriara Tresa Fitira Raditya Danu Riyanto Raihan Natawisastra Rikha Bramawanto Rikha Bramawanto Ruben Cornelius Siagian Ruben Cornelius Siagian Ruben Cornelius Siagian Ruben Cornelius Siagian Ruben Cornelius Siagian Suhernalis Suhernalis Suhernalis Suhernalis Ukta Indra Nyuswantoro Ukta Indra Nyuswantoro Ukta Indra Nyuswantoro Ukta Indra Nyuswantoro Ukta Indra Nyuswantoro Veryyon Harahap Wanri Lumbanraja Wibowo, Yuni Ari Winsyahputra Ritonga Winsyahputra Ritonga Winsyahputra Ritonga Winsyahputra Ritonga